, military response? "outfront" tonight, peter brooks, former deputy assistant secretary of defense under the bush administration, and colonel cedrick layton, former member of the joint staff. good to see both of you. colonel layton, let me start with you. if the united states were to get involved at this point, what would a serious u.s. military intervention in syria look like? >> it would probably, erin, start out with a no fly zone type operation, similar to what we had during operation southern watch, which -- and northern watch, which basically governed the skies over those parts of iraq after the first gulf war. that would be the first step. however, in order to secure things like chemical weapons, you would definitely have to look at using ground troops. it may not be u.s. ground troops, but the possibilities certainly exist that they might be used. >> of ground troops which i think is the key words for all viewers out there. ground troops is a very different sort of concept than what many people thought about what would happen in syria. and peter, i guess it comes down to this, ab